Originally Posted by bobski
i got 10 boxes of old door sets. i dont see anything like that in them.
my house is 110 years old with 55 doors. nowhere is that on any of them.
craziest thing ive ever seen.
Sticking with door knob theme. Think this goes in hand with the internal parts of an antique mortise lock. Although I cant find a pic to match "yet", there are many variations of these locks.